Charles, I think what Paul Comstock described in his book about slow-motion filming of returning bow limbs exhibiting signs of "fits and jerks", IMO, can also be said for oscillating/rotating arrows. Bows built with fewer "fits and jerks" make for a more stable shooting bow. Same can be said for arrows. So the more perfect the arrow material, the more perfect the arrow. More bends, knots, nodes, kinks, grain run-outs or what have yous, the more "fits and jerks" you'll have in the finished arrow. Key to any good arrow is proper selection to begin with..........Art